return -ret;
}
+/*
+ * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread.
+ */
+static ssize_t cmd_list_tracepoint_fields(int domain,
+ struct lttng_event_field **fields)
+{
+ int ret;
+ ssize_t nb_fields = 0;
+
+ switch (domain) {
+ case LTTNG_DOMAIN_UST:
+ nb_fields = ust_app_list_event_fields(fields);
+ if (nb_fields < 0) {
+ ret = LTTCOMM_UST_LIST_FAIL;
+ goto error;
+ }
+ break;
+ case LTTNG_DOMAIN_KERNEL:
+ default: /* fall-through */
+ ret = LTTCOMM_UND;
+ goto error;
+ }
+
+ return nb_fields;
+
+error:
+ /* Return negative value to differentiate return code */
+ return -ret;
+}
+
/*
* Command LTTNG_START_TRACE processed by the client thread.
*/
switch(cmd_ctx->lsm->cmd_type) {
case LTTNG_LIST_SESSIONS:
case LTTNG_LIST_TRACEPOINTS:
+ case LTTNG_LIST_TRACEPOINT_FIELDS:
case LTTNG_LIST_DOMAINS:
case LTTNG_LIST_CHANNELS:
case LTTNG_LIST_EVENTS:
case LTTNG_CALIBRATE:
case LTTNG_LIST_SESSIONS:
case LTTNG_LIST_TRACEPOINTS:
+ case LTTNG_LIST_TRACEPOINT_FIELDS:
need_tracing_session = 0;
break;
default:
ret = LTTCOMM_OK;
break;
}
+ case LTTNG_LIST_TRACEPOINT_FIELDS:
+ {
+ struct lttng_event_field *fields;
+ ssize_t nb_fields;
+
+ nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, &fields);
+ if (nb_fields < 0) {
+ ret = -nb_fields;
+ goto error;
+ }
+
+ /*
+ * Setup lttng message with payload size set to the event list size in
+ * bytes and then copy list into the llm payload.
+ */
+ ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event_field) * nb_fields);
+ if (ret < 0) {
+ free(fields);
+ goto setup_error;
+ }
+
+ /* Copy event list into message payload */
+ memcpy(cmd_ctx->llm->payload, fields,
+ sizeof(struct lttng_event_field) * nb_fields);
+
+ free(fields);
+
+ ret = LTTCOMM_OK;
+ break;
+ }
+
case LTTNG_START_TRACE:
{
ret = cmd_start_trace(cmd_ctx->session);
}
case LTTNG_LIST_CHANNELS:
{
- size_t nb_chan;
+ int nb_chan;
struct lttng_channel *channels;
nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type,
int ret;
gid_t gid;
- gid = allowed_group();
- if (gid < 0) {
+ ret = allowed_group();
+ if (ret < 0) {
WARN("No tracing group detected");
ret = 0;
goto end;
}
+ gid = ret;
+
/* Set lttng run dir */
ret = chown(rundir, 0, gid);
if (ret < 0) {